JP3545195B2 - Control unit mounting structure for automatic transmission for vehicles - Google Patents

Control unit mounting structure for automatic transmission for vehicles Download PDF

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Publication number
JP3545195B2
JP3545195B2 JP05816598A JP5816598A JP3545195B2 JP 3545195 B2 JP3545195 B2 JP 3545195B2 JP 05816598 A JP05816598 A JP 05816598A JP 5816598 A JP5816598 A JP 5816598A JP 3545195 B2 JP3545195 B2 JP 3545195B2
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JP
Japan
Prior art keywords
oil
control unit
recess
automatic transmission
substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP05816598A
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Japanese (ja)
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JPH11257483A (en
Inventor
弘之 湯浅
芳和 田中
Original Assignee
株式会社日立ユニシアオートモティブ
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Priority to JP05816598A priority Critical patent/JP3545195B2/en
Publication of JPH11257483A publication Critical patent/JPH11257483A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0003Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
    • F16H61/0006Electronic control units for transmission control, e.g. connectors, casings or circuit boards

Description

【0001】
【発明の属する技術分野】
本発明は、車両用自動変速機のコントロールユニット取付け構造に関する。
【0002】
【従来の技術】
従来から、ソレノイドの通電制御によってコントロールバルブに与える油圧を制御し、前記コントロールバルブを介して各摩擦係合要素(クラッチ,ブレーキ等)に油圧を供給する構成の車両用自動変速機が知られている。
【0003】
【発明が解決しようとする課題】
ところで、前記車両用自動変速機においては、前記ソレノイドの通電制御を行うコントロールユニットは、車室内やエンジンルーム内に設置されるのが一般的であったため、温度上昇に対する対策を必要としていなかった。
しかし、コントロールユニットを、自動変速機のオイルパン内に収容させる構成とした場合には、ATF(オートマチック・トランスミッション・フルード)の影響を大きく受けると共に、自己発熱による温度上昇もあり、許容温度を越えてコントロールユニットの素子温度が上昇する可能性があるという問題があった。
【0004】
本発明は上記問題点に鑑みなされたものであり、コントロールユニットをオイルパン内に収容させた場合に、許容範囲内にコントロールユニットの温度上昇を抑制できる冷却手段を提供することを目的とする。
【0005】
【課題を解決するための手段】
そのため請求項1記載の発明は、オイルパン内に収容されるバルブボディの上面に、前記バルブボディを介してオイルが循環されるよう構成された凹陥部を設ける一方、該凹陥部を覆うようにして前記バルブボディの上面にプレートを積層し、かつ、該プレートを挟んで前記凹陥部に対向するように、コントロールユニットの基板を前記プレート上に積層すると共に、前記凹陥部に油を供給する通路に、前記凹陥部内の圧力を調整するための絞りを設ける構成とした。
【0006】
かかる構成によると、コントロールユニットの基板の下方にプレートを挟んで凹陥部が配置され、該凹陥部に循環される油は、前記基板との間で熱交換を行い、基板温度が油の温度よりも高ければ基板の熱を奪って循環される。
更に、凹陥部内の圧力が絞りによって調整され、特に、油の粘性が高まる低温時における凹陥部内の圧力上昇を抑制する。
【0007】
請求項2記載の発明では、オイルクーラーの通過直後の油を前記凹陥部に供給するよう構成した。
かかる構成によると、オイルクーラーにおいて放熱し、温度が最も下がっている油が前記凹陥部に供給され、基板との間で熱交換を行う。
【0008】
【発明の効果】
請求項1記載の発明によると、バルブボディの上面にコントロールユニットの基板が積層されて、コントロールユニットがオイルパン内に収容される一方、前記基板とプレートを介して対向配置される凹陥部に油を循環させて、基板との間で熱交換を行わせることで、自動変速機の油(ATF)を冷媒として用いて基板の温度上昇を抑制できると共に、凹陥部の圧力が高まって基板に過大な負荷が加わるようになることを防止できるという効果がある。
【0009】
請求項2記載の発明によると、オイルクーラーによって温度低下した油を凹陥部に供給することで、コントロールユニットの基板の温度上昇を安定的かつ効率良く抑止できるという効果がある。
【0010】
【発明の実施の形態】
以下に本発明の実施の形態を説明する。
図1は、本実施の形態における車両用自動変速機を示す図であり、エンジン1と変速機2との間には、トルクコンバータ3が介装されている。前記変速機2は、各種のギヤ,クラッチ,ブレーキ等から構成される。
【0011】
前記変速機2のオイルパン4内には、各種のコントロールバルブが内挿されるバルブボディ5が収容されている。前記各種のコントロールバルブとしては、シフトバルブ,オーバーランクラッチバルブ,ロックアップコントロールバルブ,プレッシャーレギュレータバルブなどが設けられている。
前記バルブボディ5は、セパレートプレート(図示省略)を介して積層されるアッパーボディ5aとロアボディー5bとから構成される。アッパーボディ5aには、前記コントロールバルブに供給する油圧を電子制御するための各種ソレノイド6が装着され、該ソレノイド6の通電を制御することで、変速動作やロックアップクラッチの締結が電子制御できるようになっている。尚、前記各種ソレノイド6としては、シフトソレノイド,ライン圧ソレノイド,オーバーランクラッチソレノイド,ロックアップソレノイドなどが設けられている。
【0012】
ここで、前記ソレノイドの通電を制御するマイクロコンピュータを内蔵したコントロールユニットは、図2に示すような取付け構造により、オイルパン4内に配置されている。
図2において、アッパーボディ5aの上面には、金属製(例えばアルミ)のプレート10が積層され、更に、その上にコントロールユニットの基板11(例えばセラミック基板)が積層されている。前記基板11が積層される部分のアッパーボディ5aの上面には、凹陥部12が上方に開放して形成されており、前記プレート10が前記凹陥部12を覆うことで、油(ATF)を収容可能な容積室が形成されるようにしてある。
【0013】
尚、前記基板11上に装着される電子部品を保護すべく、基板11は図示しないカバーによって覆われ、基板11及び該基板11上の電子部品が直接油に晒されることがないようになっている。
前記凹陥部12の底面には、油を凹陥部12内に供給するための供給口13と、前記凹陥部12内の油を排出するための排出口14とが開口されており、アッパーボディ5a内に形成された図示しない油通路を介して、凹陥部12内に油が循環される構成となっている。
【0014】
前記供給口13には、絞り15が形成されており、図示しないオイルクーラーで放熱した油(ATF)が前記絞り13を介して凹陥部12内に供給され、凹陥部12内の油は前記排出口14を介して前記コントロールバルブへ供給される。
かかる構成によると、オイルクーラーによる放熱によって安定的に低温度に制御される油が凹陥部12内に供給され、プレート10を介して隣接する基板11と前記凹陥部12内の油との間で熱交換が行われ、基板11の温度が油の温度を大きく越えて上昇することを抑止する。
【0015】
また、絞り15によって、オイルクーラーから供給される油の圧力を低下させることにより、特に、油の粘性が高まる低温時において凹陥部12内の圧力が、基板11に過大な負荷を与えるほどに増加することを抑止し、かつ、高温時には、必要な冷却が行えるようにしてある。
【図面の簡単な説明】
【図1】実施の形態における車両用自動変速機を示す図。
【図2】実施の形態におけるコントロールユニット基板の取付け構造を示す図。
【符号の説明】
1 エンジン
2 変速機
3 トルクコンバータ
4 オイルパン
5 バルブボディ
5a アッパーボディ
5b ロアボディー
6 ソレノイド
10 プレート
11 基板
12 凹陥部
13 供給口
14 排出口
15 絞り
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a control unit mounting structure for an automatic transmission for a vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known an automatic transmission for a vehicle in which a hydraulic pressure applied to a control valve is controlled by energization control of a solenoid and hydraulic pressure is supplied to each friction engagement element (clutch, brake, etc.) via the control valve. I have.
[0003]
[Problems to be solved by the invention]
By the way, in the automatic transmission for a vehicle, since a control unit for controlling the energization of the solenoid is generally installed in a vehicle room or an engine room, no countermeasure against temperature rise is required. .
However, when the control unit is configured to be accommodated in the oil pan of the automatic transmission, the temperature is greatly affected by ATF (Automatic Transmission Fluid), and the temperature rises due to self-heating. Therefore, there is a problem that the element temperature of the control unit may increase.
[0004]
The present invention has been made in view of the above problems, and has as its object to provide a cooling unit that can suppress a temperature rise of a control unit within an allowable range when the control unit is housed in an oil pan.
[0005]
[Means for Solving the Problems]
Therefore, the invention according to claim 1 is provided with a concave portion configured to circulate oil through the valve body on the upper surface of the valve body housed in the oil pan, while covering the concave portion. A passage for stacking a plate on the upper surface of the valve body and stacking a substrate of the control unit on the plate so as to face the recess with the plate interposed therebetween and supplying oil to the recess; Further, a throttle for adjusting the pressure in the recess is provided .
[0006]
According to this configuration, the concave portion is disposed below the substrate of the control unit with the plate interposed therebetween, and the oil circulated through the concave portion exchanges heat with the substrate, and the substrate temperature is lower than the oil temperature. If it is too high, the heat of the substrate is taken away and circulated.
Furthermore, the pressure in the recess is adjusted by the throttle, and in particular, the rise in the pressure in the recess at the time of low temperature when the viscosity of the oil increases is suppressed.
[0007]
According to the second aspect of the invention, the oil immediately after passing through the oil cooler is supplied to the recess.
According to this configuration, the oil that radiates heat in the oil cooler and has the lowest temperature is supplied to the concave portion, and performs heat exchange with the substrate.
[0008]
【The invention's effect】
According to the first aspect of the present invention, the substrate of the control unit is stacked on the upper surface of the valve body, and the control unit is housed in the oil pan, while the oil is formed in the recessed portion that is arranged to face the substrate with the plate interposed therebetween. Circulating heat to exchange heat with the substrate, it is possible to suppress an increase in the temperature of the substrate by using the oil (ATF) of the automatic transmission as a refrigerant, and to increase the pressure in the recessed portion to cause excessive pressure on the substrate. There is an effect that it is possible to prevent an excessive load from being applied .
[0009]
According to the second aspect of the present invention, by supplying the oil whose temperature has been lowered by the oil cooler to the concave portion, there is an effect that the temperature rise of the substrate of the control unit can be stably and efficiently suppressed.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a diagram showing an automatic transmission for a vehicle according to the present embodiment. A torque converter 3 is interposed between an engine 1 and a transmission 2. The transmission 2 includes various gears, clutches, brakes, and the like.
[0011]
The oil pan 4 of the transmission 2 accommodates a valve body 5 into which various control valves are inserted. The various control valves include a shift valve, an overrun clutch valve, a lock-up control valve, a pressure regulator valve, and the like.
The valve body 5 includes an upper body 5a and a lower body 5b that are stacked via a separate plate (not shown). Various solenoids 6 for electronically controlling the hydraulic pressure supplied to the control valve are mounted on the upper body 5a. By controlling the energization of the solenoids 6, the shifting operation and the engagement of the lock-up clutch can be electronically controlled. It has become. The various solenoids 6 include a shift solenoid, a line pressure solenoid, an overrun clutch solenoid, a lock-up solenoid, and the like.
[0012]
Here, a control unit including a microcomputer for controlling the energization of the solenoid is arranged in the oil pan 4 by a mounting structure as shown in FIG.
In FIG. 2, a metal (for example, aluminum) plate 10 is laminated on the upper surface of the upper body 5a, and a control unit substrate 11 (for example, a ceramic substrate) is further laminated thereon. On the upper surface of the upper body 5a where the substrate 11 is laminated, a concave portion 12 is formed to open upward, and the plate 10 covers the concave portion 12 to accommodate oil (ATF). A possible volume chamber is formed.
[0013]
In order to protect the electronic components mounted on the substrate 11, the substrate 11 is covered with a cover (not shown) so that the substrate 11 and the electronic components on the substrate 11 are not directly exposed to oil. I have.
A supply port 13 for supplying oil into the concave portion 12 and a discharge port 14 for discharging the oil in the concave portion 12 are opened in the bottom surface of the concave portion 12, and the upper body 5a Oil is circulated in the recess 12 through an oil passage (not shown) formed therein.
[0014]
A throttle 15 is formed in the supply port 13, and oil (ATF) radiated by an oil cooler (not shown) is supplied into the recess 12 through the throttle 13, and the oil in the recess 12 is discharged from the drain 12. It is supplied to the control valve via an outlet 14.
According to such a configuration, oil that is stably controlled to a low temperature by heat radiation by the oil cooler is supplied into the recess 12, and between the substrate 11 adjacent via the plate 10 and the oil in the recess 12. Heat exchange is performed, and the temperature of the substrate 11 is prevented from rising significantly beyond the oil temperature.
[0015]
Also, by reducing the pressure of the oil supplied from the oil cooler by the throttle 15, the pressure in the recess 12 particularly increases at a low temperature when the viscosity of the oil increases so that an excessive load is applied to the substrate 11. And at the time of high temperature, necessary cooling can be performed.
[Brief description of the drawings]
FIG. 1 is a diagram showing an automatic transmission for a vehicle according to an embodiment.
FIG. 2 is a diagram showing a mounting structure of a control unit board in the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Engine 2 Transmission 3 Torque converter 4 Oil pan 5 Valve body 5a Upper body 5b Lower body 6 Solenoid
10 plates
11 Substrate
12 recess
13 Supply port
14 Outlet
15 aperture

Claims (2)

オイルパン内に収容されるバルブボディの上面に、前記バルブボディを介してオイルが循環されるよう構成された凹陥部を設ける一方、該凹陥部を覆うようにして前記バルブボディの上面にプレートを積層し、かつ、該プレートを挟んで前記凹陥部に対向するように、コントロールユニットの基板を前記プレート上に積層すると共に、前記凹陥部に油を供給する通路に、前記凹陥部内の圧力を調整するための絞りを設けてなる車両用自動変速機のコントロールユニット取付け構造。On the upper surface of the valve body housed in the oil pan, a concave portion configured to circulate oil through the valve body is provided, and a plate is formed on the upper surface of the valve body so as to cover the concave portion. The control unit substrate is stacked on the plate so as to face the recess with the plate interposed therebetween, and the pressure in the recess is adjusted to a passage for supplying oil to the recess. Control unit mounting structure for an automatic transmission for a vehicle, which is provided with a throttle to perform the operation . オイルクーラーの通過直後の油を前記凹陥部に供給するよう構成されたことを特徴とする請求項1記載の車両用自動変速機のコントロールユニット取付け構造。2. The control unit mounting structure for an automatic transmission for a vehicle according to claim 1 , wherein the oil immediately after passing through an oil cooler is supplied to the recess.
JP05816598A 1998-03-10 1998-03-10 Control unit mounting structure for automatic transmission for vehicles Expired - Fee Related JP3545195B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05816598A JP3545195B2 (en) 1998-03-10 1998-03-10 Control unit mounting structure for automatic transmission for vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05816598A JP3545195B2 (en) 1998-03-10 1998-03-10 Control unit mounting structure for automatic transmission for vehicles

Publications (2)

Publication Number Publication Date
JPH11257483A JPH11257483A (en) 1999-09-21
JP3545195B2 true JP3545195B2 (en) 2004-07-21

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US7624660B2 (en) 2005-10-03 2009-12-01 Toyota Jidosha Kabushiki Kaisha Automatic transmission
CN101663511B (en) * 2007-05-28 2013-03-06 爱信艾达株式会社 Cooling device for control unit for automatic transmission

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JP4710656B2 (en) * 2006-03-03 2011-06-29 株式会社デンソー Automatic transmission
JP4793232B2 (en) * 2006-11-24 2011-10-12 アイシン・エィ・ダブリュ株式会社 Automatic transmission
JPWO2008062865A1 (en) 2006-11-24 2010-03-04 アイシン・エィ・ダブリュ株式会社 Automatic transmission control unit and automatic transmission equipped with the control unit
JP5305205B2 (en) * 2007-03-20 2013-10-02 コンティ テミック マイクロエレクトロニック ゲゼルシャフト ミット ベシュレンクテル ハフツング Control apparatus for use in an engine room or transmission of an automobile and a cooling device for such a control apparatus
US9743563B2 (en) 2007-03-20 2017-08-22 Conti Temic Microelectronic Gmbh Control appliance for using in the engine compartment or in the transmission of a motor vehicle and cooling system for such a control appliance
DE102013220599A1 (en) * 2013-10-11 2015-04-16 Zf Friedrichshafen Ag Oil pan and unit with such an oil pan
DE102014207799A1 (en) * 2014-04-25 2015-10-29 Zf Friedrichshafen Ag Transmission with an electrical transmission control device
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JPH023740A (en) * 1988-06-20 1990-01-09 Jatco Corp Electronic control type automatic speed change gear
DE9307228U1 (en) * 1993-05-12 1993-07-15 Siemens Ag, 8000 Muenchen, De
DE19517491A1 (en) * 1995-05-12 1996-11-14 Zahnradfabrik Friedrichshafen Cooling for a transmission control
DE19604948A1 (en) * 1996-02-10 1997-08-14 Telefunken Microelectron Control arrangement for an automatic electrohydraulically controlled transmission

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US7624660B2 (en) 2005-10-03 2009-12-01 Toyota Jidosha Kabushiki Kaisha Automatic transmission
CN101663511B (en) * 2007-05-28 2013-03-06 爱信艾达株式会社 Cooling device for control unit for automatic transmission

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